IDY10220 SECURITE High Seas Forecast for Western METAREA 10 12S TO 30S BETWEEN 90E AND 125E, AND 30S TO 50S BETWEEN 80E AND 129E Issued by the Australian Government Bureau of Meteorology For 24 hours commencing 1100 UTC 28 October 2025 Part 1 Warnings Refer to latest warnings for details of the area affected. Melbourne Gale Warning 4. Part 2 Situation at 280600 UTC Cold front 28S104E 37S109E 48S108E. Forecast near 41S117E 45S117E 49S116E at 290600UTC, weakening thereafter. Trough [1] 38S090E 42S094E 47S094E. Forecast near 42S114E 46S114E 49S112E at 291200UTC. Low [1] 978hPa developing near 48S098E at 281500UTC. Forecast low [1] 978hPa near at 291200UTC. Trough [2] forecast to develop near 33S121E to developing low [2] 1000hPa near 36S118E at 282100UTC. Forecast trough 34S125E to low [2] 998hPa near 41S122E at 291200UTC. Warm front developing near 41S082E 44S082E 46S080E at 290600UTC. Forecast near 40S088E 46S085E 47S080E at 291200UTC. Part 3 Forecast Refer to latest warnings for boundary of affected area and type of weather system. South of line 34S080E 32S110E 34S115E, outside warning areas: Westerly quarter winds, shifting northwesterly quarter within 120nm east of trough [1] and within 60nm west of trough [2], shifting northeasterly within 120nm east of trough [2] and within 60nm east of warm front. Winds shifting northerly within 180nm east of cold front and turning clockwise within 180nm of lows. Wind speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell. Remainder: Winds not exceeding 25 knots. Moderate to rough seas. Moderate to heavy swell throughout remainder except east of line 12S111E 21S115E. Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of troughs, fronts and low [2], within 540nm of low [1], and west of line 15S093E 12S093E. Heavy at times within 120nm of trough [2]. Visibility reducing below 2nm in precipitation. Please be aware Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height. WEATHER MELBOURNE The next routine forecast will be issued at 20:00 UTC Tuesday.